JPH10263658A - Flatness control method of rolled stock in hot finishing mill - Google Patents

Flatness control method of rolled stock in hot finishing mill

Info

Publication number
JPH10263658A
JPH10263658A JP9073138A JP7313897A JPH10263658A JP H10263658 A JPH10263658 A JP H10263658A JP 9073138 A JP9073138 A JP 9073138A JP 7313897 A JP7313897 A JP 7313897A JP H10263658 A JPH10263658 A JP H10263658A
Authority
JP
Japan
Prior art keywords
flatness
coiler
rolled material
difference
elongation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9073138A
Other languages
Japanese (ja)
Inventor
Sadayuki Mitsuyoshi
貞行 三吉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP9073138A priority Critical patent/JPH10263658A/en
Publication of JPH10263658A publication Critical patent/JPH10263658A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To enable high precise flatness control even after coiling a rolled stock onto a coiler. SOLUTION: In the case of coiling the rolled stock S rolled with a hot finishing mill 1 with the coiler 5, the degree of flatness is measured just before coiling the rolled stock S onto the coiler 5 to operate the difference in elongation percentage and the degree of flatness is measured just after coiling onto the coiler 5 to operate the difference in elongation percentage with a flatness gage 6 arranged in the outlet side of the finishing mill 1, the difference in elongatiorn percentage of the rolled stock S obtained after coiling onto the coiler 5 is corrected using the ratio of these differences in elongation percentage to control the work roll bender 3 of the finishing mill 1, whereby flatness control having excellent precision is realized.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は熱間仕上圧延機にお
ける圧延材の平坦度制御方法に関する。
The present invention relates to a method for controlling flatness of a rolled material in a hot finishing mill.

【0002】[0002]

【従来の技術】従来、タンデム圧延機(以下、単に圧延
機という)で圧延された圧延材の品質の一つとして、平
坦度に良好なものが求められている。平坦度の制御方法
としては圧延機出側に平坦度計を設置し、その測定値に
基づき圧延機最終スタンドのベンダを操作する方法が一
般に行われている。
2. Description of the Related Art Conventionally, as a quality of a rolled material rolled by a tandem rolling mill (hereinafter simply referred to as a rolling mill), a material having good flatness is required. As a method of controlling the flatness, a method of installing a flatness meter on the exit side of a rolling mill and operating a bender of a final stand of the rolling mill based on the measured value is generally used.

【0003】この平坦度計としては、各種の方式のもの
が開発されている(たとえば、日本鉄鋼協会編:「板圧
延の理論と実際」P265〜270,(1984)参照)が、冷間圧延
では圧延材の幅方向張力分布を用いて幅方向伸び率差を
算出するのが一般的である。一方、熱間圧延では圧延材
の幅方向各点における長手方向の高さ変動を測定して平
坦度を算出する方式が一般的である。
[0003] Various types of flatness meters have been developed (for example, see Theory and Practice of Sheet Rolling, edited by The Iron and Steel Institute of Japan, pages 265 to 270, (1984)). In this case, it is general to calculate the difference in elongation percentage in the width direction using the tension distribution in the width direction of the rolled material. On the other hand, in hot rolling, a method of measuring a height variation in a longitudinal direction at each point in a width direction of a rolled material and calculating flatness is generally used.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、上記し
た熱間圧延で一般的に用いられる平坦度計では圧延材が
圧延機出側に配置されたコイラに巻き付く前は圧延材に
張力が発生しないため、平坦度を正確に測定することが
可能であるが、圧延材がコイラに巻き付いた後は圧延材
に張力が発生するため、形状が一部潜在化してしまって
正確な測定ができず、したがってベンディング制御が精
度よくできないという欠点があった。
However, in the flatness gauge generally used in the above-mentioned hot rolling, tension is not generated in the rolled material before the rolled material is wound around the coiler arranged on the exit side of the rolling mill. Therefore, it is possible to measure the flatness accurately, but after the rolled material is wound around the coiler, tension is generated in the rolled material, and the shape is partially latent, so that accurate measurement cannot be performed. Therefore, there is a disadvantage that bending control cannot be performed with high accuracy.

【0005】本発明は、上記のような従来技術が有する
課題を解決した熱間仕上圧延機における圧延材の平坦度
制御方法を提供することを目的とする。
An object of the present invention is to provide a method for controlling the flatness of a rolled material in a hot finish rolling mill which has solved the problems of the prior art as described above.

【0006】[0006]

【課題を解決するための手段】本発明は、熱間仕上圧延
機で圧延された圧延材をコイラで巻き取る際に、前記圧
延機の出側に設置した平坦度計での平坦度測定値を用い
て圧延材の平坦度を制御する方法であって、前記平坦度
計によって、圧延材が前記コイラに巻き付く直前に平坦
度を測定して伸び率差を演算するとともに、前記コイラ
に巻き付いた直後に測定して伸び率差を演算する段階
と、これらの伸び率差の比を用いて前記コイラに巻き付
いた後に得られた圧延材の伸び率差を補正して前記圧延
機のワークロールベンダを制御する段階と、からなるこ
とを特徴とする熱間仕上圧延機における圧延材の平坦度
制御方法である。
SUMMARY OF THE INVENTION According to the present invention, when a rolled material rolled by a hot finish rolling mill is wound up by a coiler, a flatness measured by a flatness meter installed on an output side of the rolling mill is measured. A method of controlling the flatness of a rolled material using the method, wherein the flatness meter measures the flatness just before the rolled material is wound around the coiler to calculate an elongation difference, and winds around the coiler. Calculating the elongation difference by measuring immediately after the work roll of the rolling mill by correcting the elongation difference of the rolled material obtained after being wound around the coiler using the ratio of these elongation differences. And v. Controlling the vendor. 2. A method for controlling flatness of a rolled material in a hot finishing mill, comprising the steps of:

【0007】[0007]

【発明の実施の形態】以下に、本発明の好適な実施の形
態について、図面を参照して詳しく説明する。図1は本
発明の実施例を示す概要図である。この図において、1
はたとえば7スタンドからなる熱間仕上圧延機で、最終
スタンド2にはワークロールベンダ3が配設される。4
は複数のローラからなるランナウトテーブルである。5
はコイラで、No. 1コイラ5aとNo. 2コイラ5bの2
基から構成され、熱間仕上圧延機1で圧延された圧延材
Sは交互に巻き取られる。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of the present invention. In this figure, 1
Is a hot finishing rolling mill composed of, for example, seven stands, and a work roll bender 3 is arranged on the final stand 2. 4
Is a runout table composed of a plurality of rollers. 5
Is the No. 1 coiler 5a and No. 2 coiler 5b
The rolled material S composed of a base and rolled by the hot finishing mill 1 is wound up alternately.

【0008】6は平坦度計で、熱間仕上圧延機1の出側
のランナウトテーブル4上に取り付けられる。7はたと
えばHMDなどのコイラトラッキング信号発生装置で、
No.1コイラ5aとNo. 2コイラ5bの上部に取り付け
られる。8は平坦度演算制御装置で、平坦度計6の測定
信号とコイラトラッキング信号発生装置7からのトラッ
キング信号を入力して平坦度を演算して、ベンダ制御装
置9を介してワークロールベンダ3を制御する。10はセ
ットアップ計算機である。
Reference numeral 6 denotes a flatness meter, which is mounted on the runout table 4 on the exit side of the hot finishing mill 1. Reference numeral 7 denotes a coiler tracking signal generator such as an HMD.
It is mounted on the top of No. 1 coiler 5a and No. 2 coiler 5b. Reference numeral 8 denotes a flatness calculation control device which inputs a measurement signal of the flatness meter 6 and a tracking signal from the coiler tracking signal generation device 7 to calculate flatness, and outputs the work roll bender 3 via a bender control device 9. Control. 10 is a setup calculator.

【0009】ここで、平坦度演算制御装置8における演
算手順の内容について説明すると、いま、圧延材Sの端
部から所定位置(たとえば100 mm)での伸び率のオペレ
ータサイドとドライブサイドの平均値をεE とし、圧延
材Sの幅方向中央部の伸び率をεC とすると、平坦度計
6で測定される平坦度信号は伸び率差Δεとして下記
(1) 式で表される。
Here, the content of the calculation procedure in the flatness calculation control device 8 will be described. Now, the average value of the elongation percentage at a predetermined position (for example, 100 mm) from the end of the rolled material S on the operator side and the drive side Is ε E and the elongation percentage at the center in the width direction of the rolled material S is ε C , and the flatness signal measured by the flatness meter 6 is represented by the following elongation difference Δε:
It is expressed by equation (1).

【0010】 Δε=εE −εC ………………(1) そこで、まず、平坦度演算制御装置8はこの伸び率差Δ
εを受けて、圧延材Sがコイラ5に巻き付く前のベンダ
操作量ΔFを下記(2) 式で演算する。 ΔF={1/(δε/δF)}・KP ・{1+1/(TI ・s)} ・(Δε−Δε0 ) ………………(2) ここで、δε/δFはワークロールベンダ3からの伸び
率差への影響係数で、所定の圧延モデル式(たとえば、
日本鉄鋼協会編:「板圧延の理論と実際」P308〜313,(1
984))から算出して求める。KP は比例ゲイン、TI
積分時定数で、これらは一般にいうPIゲインである。
Δε0 は伸び率差目標値で、圧延材Sの製品仕様より決
定される値である。
[0010] Δε = ε E -ε C .................. ( 1) Thus, first, the flatness control processor 8 this elongation difference Δ
In response to ε, the bender operation amount ΔF before the rolled material S is wound around the coiler 5 is calculated by the following equation (2). ΔF = {1 / (δε / δF)} · K P · {1 + 1 / (T I · s)} · (Δε−Δε 0 ) where δε / δF is a work roll. The coefficient of influence on the difference in elongation from the vendor 3 is a predetermined rolling model formula (for example,
Edited by The Iron and Steel Institute of Japan: “Theory and Practice of Sheet Rolling” P308-313, (1
984)). K P is a proportional gain, T I is an integration time constant, and these are generally called PI gains.
Δε 0 is a target value of elongation difference, which is a value determined from the product specifications of the rolled material S.

【0011】つぎに、圧延材Sがコイラ5に巻き付いた
後のベンダ操作量ΔFを下記(3) 式で演算する。 ΔF={1/(δε/δF)}・KP ・{1+1/(TI ・s)} ・{(Δε10/Δε20)・Δε−Δε0 } ………………(3) ここで、Δε10は圧延材Sがコイラ5に巻き付く直前に
平坦度計6で測定した圧延材の伸び率差、Δε20は圧延
材Sがコイラ5に巻き付いた直後に平坦度計6で測定し
た圧延材の伸び率差である。
Next, the bender operation amount ΔF after the rolled material S is wound around the coiler 5 is calculated by the following equation (3). ΔF = {1 / (δε / δF)} · K P · {1 + 1 / (T I · s)} · {(Δε 10 / Δε 20 ) · Δε−Δε 0 … ……………… (3) in, [Delta] [epsilon] 10 growth rate difference of the rolling material rolled material S was measured by the flatness meter 6 just before wound around the coiler 5, [Delta] [epsilon] 20 is measured by a flatness meter 6 immediately after the rolled material S is wound around the coiler 5 This is the difference in elongation percentage of the rolled material.

【0012】以下に、本発明の作用を説明する。熱間仕
上圧延機1で圧延された圧延材Sはランナウトテーブル
4を経てたとえばNo. 1コイラ5aに巻き取られるとす
る。圧延材SがそのNo. 1コイラ5aに巻き付くまでの
間は、平坦度計6でその平坦度を測定して平坦度演算制
御装置8に入力し、平坦度演算制御装置8は前記(2) 式
でコイラ5に巻き付く前のベンダ操作量ΔFを演算し、
ベンダ制御装置9に出力する。ベンダ制御装置9はこれ
に基づいてワークロールベンダ3のベンディング圧力を
制御する。なお、(2) 式での影響係数δε/δFおよび
比例ゲインKP 、積分時定数TI 、伸び率差目標値Δε
0 は、セットアップ計算機10での設定計算結果としてあ
らかじめ平坦度演算制御装置8に伝送されて、設定され
る。
The operation of the present invention will be described below. It is assumed that the rolled material S rolled by the hot finish rolling mill 1 is wound through a run-out table 4 to, for example, a No. 1 coiler 5a. Until the rolled material S is wound around the No. 1 coiler 5a, the flatness is measured by the flatness meter 6 and input to the flatness calculation control device 8. ) Is used to calculate the vendor operation amount ΔF before winding around the coiler 5;
Output to the vendor control device 9. The vendor controller 9 controls the bending pressure of the work roll bender 3 based on this. In addition, the influence coefficient δε / δF, the proportional gain K P , the integration time constant T I , the elongation difference target value Δε in the equation (2)
“0” is transmitted to the flatness calculation control device 8 in advance as a setting calculation result in the setup computer 10 and set.

【0013】一方、コイラトラッキング信号発生装置7
は圧延材Sのトラッキング状態を監視して、圧延材Sが
No. 1コイラ5aに巻き付いた時点でコイラ・オン信号
を平坦度演算制御装置8に送信する。このタイミング
で、平坦度演算制御装置8は圧延材SがNo. 1コイラ5
aに巻き付く直前に平坦度計6で測定した圧延材の伸び
率差Δε10とNo. 1コイラ5aに巻き付いた直後の圧延
材の伸び率差Δε20を記憶しておき、No. 1コイラ5a
に巻き付いた後は前記(3) 式を用いてベンダ操作量ΔF
を演算し、ベンダ制御装置9に出力してワークロールベ
ンダ3のベンディング圧力を制御する。
On the other hand, the coiler tracking signal generator 7
Monitors the tracking state of the rolled material S,
A coiler-on signal is transmitted to the flatness calculation controller 8 when the coiler is wound around the No. 1 coiler 5a. At this timing, the flatness calculation controller 8 determines that the rolled material S is the No. 1 coiler 5
stores the elongation difference [Delta] [epsilon] 20 of the strip immediately after wound around the No. 1 coiler 5a and elongation difference [Delta] [epsilon] 10 of the strip as measured by the flatness meter 6 just before wound on a, No. 1 coiler 5a
After the winding, the vendor operation amount ΔF is calculated using the above equation (3).
Is calculated and output to the bender control device 9 to control the bending pressure of the work roll bender 3.

【0014】因みに、7スタンドの熱間仕上圧延機を用
いて、板厚;2.3mm で板幅;1200mmの圧延材を圧延した
際に本発明法を適用した。平坦度計としてはレーザ距離
計タイプを用いた。図2に、次工程で接触式平坦度計で
測定した平坦度(%)を示す。本発明法では、従来法に
比べてコイラー巻き付け後の平坦度精度が2倍以上に向
上していることがわかる。
Incidentally, the method of the present invention was applied when a rolled material having a sheet thickness of 2.3 mm and a sheet width of 1200 mm was rolled using a 7-stand hot finishing mill. A laser distance meter type was used as the flatness meter. FIG. 2 shows the flatness (%) measured by the contact flatness meter in the next step. It can be seen that the flatness accuracy after winding the coiler is more than doubled in the method of the present invention as compared with the conventional method.

【0015】[0015]

【発明の効果】以上説明したように、本発明によれば、
平坦度計によって、圧延材が前記コイラに巻き付く直前
に平坦度を測定して伸び率差を演算するとともに、前記
コイラに巻き付いた直後に測定して伸び率差を演算する
段階と、これらの伸び率差の比を用いて前記コイラに巻
き付いた後に得られた圧延材の伸び率差を補正して前記
圧延機のワークロールベンダを制御する段階とからなる
ようにしたので、圧延材がコイラに巻き付いた後も高精
度の平坦度制御が可能である。
As described above, according to the present invention,
By a flatness meter, the flatness is measured just before winding around the coiler, and the elongation difference is calculated by measuring the flatness, and immediately after winding around the coiler, the elongation difference is calculated. Controlling the work roll bender of the rolling mill by correcting the difference in elongation of the rolled material obtained after being wound around the coiler by using the ratio of the difference in elongation. High precision flatness control is possible even after winding.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例を示す概要図である。FIG. 1 is a schematic diagram showing an embodiment of the present invention.

【図2】平坦度の推移を示す特性図である。FIG. 2 is a characteristic diagram showing transition of flatness.

【符号の説明】[Explanation of symbols]

1 熱間仕上圧延機 2 最終スタンド 3 ワークロールベンダ 4 ランナウトテーブル 5 コイラ 5a No. 1コイラ 5b No. 2コイラ 6 平坦度計 7 コイラトラッキング信号発生装置 8 平坦度演算制御装置 9 ベンダ制御装置 10 セットアップ計算機 S 圧延材 DESCRIPTION OF SYMBOLS 1 Hot finishing rolling mill 2 Final stand 3 Work roll bender 4 Run out table 5 Coirer 5a No. 1 Coiler 5b No. 2 Coirer 6 Flatness meter 7 Coiler tracking signal generator 8 Flatness calculation control device 9 Vendor control device 10 Setup calculator S Rolled material

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 熱間仕上圧延機で圧延された圧延材をコ
イラで巻き取る際に、前記圧延機の出側に設置した平坦
度計での平坦度測定値を用いて圧延材の平坦度を制御す
る方法であって、 前記平坦度計によって、圧延材が前記コイラに巻き付く
直前に平坦度を測定して伸び率差を演算するとともに、
前記コイラに巻き付いた直後に測定して伸び率差を演算
する段階と、 これらの伸び率差の比を用いて前記コイラに巻き付いた
後に得られた圧延材の伸び率差を補正して前記圧延機の
ワークロールベンダを制御する段階と、からなることを
特徴とする熱間仕上圧延機における圧延材の平坦度制御
方法。
When a rolled material rolled by a hot finish rolling mill is taken up by a coiler, the flatness of the rolled material is measured by using a flatness meter measured by a flatness meter installed on an outlet side of the rolling mill. A method for controlling the flatness meter, while calculating the difference in elongation by measuring the flatness just before the rolled material is wound around the coiler,
Measuring the elongation difference by measuring immediately after winding on the coiler; and correcting the elongation difference of the rolled material obtained after winding on the coiler using the ratio of these elongation differences to perform the rolling. Controlling the work roll bender of the mill. 2. A method for controlling flatness of a rolled material in a hot finishing mill.
JP9073138A 1997-03-26 1997-03-26 Flatness control method of rolled stock in hot finishing mill Pending JPH10263658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9073138A JPH10263658A (en) 1997-03-26 1997-03-26 Flatness control method of rolled stock in hot finishing mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9073138A JPH10263658A (en) 1997-03-26 1997-03-26 Flatness control method of rolled stock in hot finishing mill

Publications (1)

Publication Number Publication Date
JPH10263658A true JPH10263658A (en) 1998-10-06

Family

ID=13509555

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9073138A Pending JPH10263658A (en) 1997-03-26 1997-03-26 Flatness control method of rolled stock in hot finishing mill

Country Status (1)

Country Link
JP (1) JPH10263658A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010005655A (en) * 2008-06-26 2010-01-14 Sumitomo Metal Ind Ltd Method and equipment for manufacturing hot-rolled steel plate
JP2011161473A (en) * 2010-02-08 2011-08-25 Sumitomo Metal Ind Ltd Shape controlling method, manufacturing method and manufacturing apparatus of hot-rolled plate
JP2013035031A (en) * 2011-08-08 2013-02-21 Nippon Steel & Sumitomo Metal Corp Shape measurement method of metal plate, shape measurement implement and rolling method of metal plate

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010005655A (en) * 2008-06-26 2010-01-14 Sumitomo Metal Ind Ltd Method and equipment for manufacturing hot-rolled steel plate
JP2011161473A (en) * 2010-02-08 2011-08-25 Sumitomo Metal Ind Ltd Shape controlling method, manufacturing method and manufacturing apparatus of hot-rolled plate
JP2013035031A (en) * 2011-08-08 2013-02-21 Nippon Steel & Sumitomo Metal Corp Shape measurement method of metal plate, shape measurement implement and rolling method of metal plate

Similar Documents

Publication Publication Date Title
JP5581964B2 (en) Thickness control method in reverse rolling mill
JP3253013B2 (en) Strip crown and shape control method in hot rolling
JPH10263658A (en) Flatness control method of rolled stock in hot finishing mill
JP3067879B2 (en) Shape control method in strip rolling
JP3341622B2 (en) Strip width control method in hot rolling line
JP3506119B2 (en) Method of changing rolling load distribution of tandem rolling mill
JP3610338B2 (en) Method and apparatus for temper rolling of metal strip
JP3062017B2 (en) Thickness control method in hot rolling
JP3069001B2 (en) Feedback control method of sheet crown / shape model
KR100368231B1 (en) Shape Control Method of Steel Strip in Hot Rolling Process
JP4086120B2 (en) Cold rolling method for hot rolled steel strip before pickling
JP4086119B2 (en) Shape control method in cold rolling of hot rolled steel strip before pickling
JP2825428B2 (en) Strip crown control method in rolling mill
JP2650575B2 (en) Thick plate width control rolling method
JP3344092B2 (en) Rolling machine tension control method
JPH11179414A (en) Method for estimating amount of uneven elongation in cold rolling mill and method for controlling shape
JP3205175B2 (en) Strip width control method in hot rolling
JP3396774B2 (en) Shape control method
JP2950182B2 (en) Manufacturing method of tapered steel plate
JP2661497B2 (en) Strip crown control device and strip crown control method during hot rolling
JP2000301221A (en) Method for controlling edge drop during cold rolling
JPH09122724A (en) Method for controlling sheet crown in hot finishing mill
JPH07303911A (en) Method for controlling sheet crown and shape
JPH10166019A (en) Method for controlling shape of rolled stock in rolling line
JPH11333507A (en) Method for controlling sheet crown